View source for JTable/getNextOrder

===Source Body===
<source lang="php">
function getNextOrder ( $where='' )
{
        if (!in_array( 'ordering', array_keys($this->getProperties()) ))
        {
                $this->setError( get_class( $this ).' does not support ordering' );
                return false;
        }

        $query = 'SELECT MAX(ordering)' .
                        ' FROM ' . $this->_tbl .
                        ($where ? ' WHERE '.$where : '');

        $this->_db->setQuery( $query );
        $maxord = $this->_db->loadResult();

        if ($this->_db->getErrorNum())
        {
                $this->setError($this->_db->getErrorMsg());
                return false;
        }
        return $maxord + 1;
}
</source>

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